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X. On the Action of the Excised Mammalian Heart. 
By Augustus D. Waller, M.D., and E. Waymouth Reid, B.A., M.B. 
Communicated by Professor Burdon Sanderson, F.R.S. 
Received November 18,—Read December 16, 1886. 
Contents. 
§ I. Introduction.. . .. 
§ II. Mode of decline of excised heart .. 
§ III. Duration of systole . 
§ IV. Latent period of stimulation . 
§ Y. Wave of contraction. 
a. In excited contraction. 
b. In spontaneous contraction 
§ VI. Galvanometer indications . 
a. Of excited contractions 
b. Of spontaneous contractions 
§ VII. Electrometer indications. 
a. Of spontaneous contractions 
b. Of excited contractions 
§ VIII. Conclusion. 
CAGE 
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Tables. 
A. Number and length of beats post mortem... 
>) )> >> . 
C. Relation between length of pause and strength of contraction. 
D. Auriculo-ventricular block. 
E. Length of latent period . 
F. Rate of contraction-wave excited. Mammal and Frog. Ventricle. 
G. ,, ,, „ Auricle. Mammal... .. . 
H. „ ,, spontaneous. Mammal and Frog. Ventricle 
I. Galvanometer observations. 
K. Electrometer observations .. 
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Tracings. 
1. Mode of decline of excised Rabbit’s heart... 218 
2. Bigeminal beat. Apex and base . 219 
3. „ ,, Auricle and ventricle. 219 
4. Phases and pauses . 219 
16.8,87 
